I think it is a poster, not that actual game box, which is really awesome! Not to say having the original box for the game wouldn't be pretty sweet too, but a full size MI movie poster is extremely cool. Rare (impossible?) to find game box art that gorgeous these days.

I saw Dark Forces (one of my all time favorite games from my youth) on floppies in a near mint condition box at a thrift store not to long back, almost bought it, but passed it up realizing it would just be one more thing to lug around every time I move.